Engraving-block



H. PLUNIMER.

ENGRAVING Block.

APPLICATION FILED MAR- 6. 1919.

1 ,397,293, Patented Nov. 15, 1921.

2 SHBETS-SHEET l.

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- INVENTOR:

WITNESS: E? fm w' UML `7 ATTORNEY.

H. PLUIVIMER.

ENGRAVING BLOCK.

APPLlcATloN HLED MAR. 6. 1919.

1,397,293. Patented Nov.` 15 21.

` 2 sHEETs-SHE W I TNESS I N V EN TOR:

j v ATTORNEY.

HORACE PLUMMER, OF LAWRENCE TOi/VNSHIP, MAREGN COUNTY, NDANA.

Specification of Letters Patent.

Patented N ov. 15, 1921i Application filed March 6, 1919. Serial No.281,009.

To all t0/tom t may concern.'

Be it knownthat I, HORACE PLUMMER, a citizen of the United States,residing in Lawrence township, in the county of Marion and' State ofIndiana, have invented a new and useful Engraving-Block, of which thefollowing` isa specification, reference being had to the accompanyingdrawings, and to the letters and figures of reference marked thereon.

This invention relates to means for holding various articles, andespecially small articles to be worked upon, the invention havingreference more particularlyto means for adjustably holding jewelry orother articles while being engraved by means of hand-tools.

An object of the invention is to provide an improved engraving blockIwhich shall be so constructed as to be adapted to hold articles ofvarious sizes, and shapes, without requiring the use of a large numberlof pins or similar devices to be used at different times andnecessitating caretaking when not in use.

Another object is to provide an engraving block of such construction asto be adapted to be immediately used when required, without requiringtroublesome adjustments, and which shall be readily adjustable to suitthe various requirements of the engraver.

A further object is to provide an adjustable engraving bloclr whichshall be so con gtructed as to be adjusted with precision and adapted tobe readily adjusted to insure precision in action, so as to not be looseand wabbling with resultant hampering of the engraving work.

still further object is to provide an engraving block whichV shall be ofsuch construction as to be adapted to be supported either stationarilyor so as to be titled, as may be desired, and which shall be strong,durable and economical in use.

With the above-mentioned and other objects in view, the inventionconsists in an improved engraving block having various novel features ofconstruction, more particularly relating to the jaws and clampingdevices thereof; and, the invention consists also further in the novelparts and combinations and arrangements of parts as hereinafterparticularly described and further defined in the accompanying claims.

Referring to the drawings,-Figure 1 is an elevation of the improvedengraving block; Fig. 2 is a top plan of the engraving block; Fig. 3 isa vertical central 'section of the engraving block; Fig. l is a verticalcen tral section on a plane at right angles to the plane of the sectionin Fig. 3; Fig. 5 is a fragmentary vertical central section on anenlarged scale; Fig. 6 is a fragmentary section on the line Vl-VI inFig. 2 on an enlarged scale; Fig. 7 is a vertical sectional elevation ofthe improved adjustable jaw device; Fig. 8 is a top plan of one of theparts of the jaw device; Fig. 9 is a plan of one endcof the jaw; Fig.yl() is an elevation of an improved device for operating and controllingthe improved jaws of the engraving block; and, Fig. ll is a longitudinalsection, partially broken away, of the screw for operating andcontrolling the jaws of the engraving block.

Similar reference characters throughout the various iigures of thedrawings indicate corresponding elements or features of constructionherein referred to in detail.

The engraving block, 'as preferably constructed, has a foundationcomprising a botf toni i which may be wooden and a metallic ring 2thereon composed of suitable metal such as brass, the bottom beingladapted to rest firmly upon a work bench. A heavy metallic base 3 isprovided which has a spherical. bottom portion d that rests upon thering 2 and is adapted to slide thereon so as to tilt the base which hasa fiat top portion 5. The base has a central vertical bore 6 in which abearing case 7 is closely fitted removably. The base has screw-threadedholes 8 and 9 horizontally arranged therein and extending from thebottom portion i to the bore 6 in which screws l() and ll arerespectively inserted to engage and secure the case 7 in the bore. Thecase 7 can be removed from the base and again arranged in the base inrelatively inverted position to permit the base to rest stationarily onits flat portion 5, when it may be desired that the base be stationary,instead of being adjustable on the foundation. The case 7 has a centralbore l2 at one end of which is a ball cup or race 13 and at the oppositeend a ball cup or race la. An axle is arranged in the bearing case andcomprises a main portion 15 having a cone collar 16 which is supportedon balls 17 arranged in the cup 13. The main portion of the axle has arelasoV tively small screw-threaded lower portion 18 on which a conecollar 19 is adjustably ar ranged which supports bearing balls 20 thatare arranged in the ball cup 14. Preferably a washer 21 is arrangedbelow the cone 19 and a nut 22 in contact with the washer for securingthe cone in place when adjusted. The axle may be freely turned withoutnoise and without lubrication; and it has a head portion 23 provided onits top with a short cylindrical guide projection 24.

A metallic table or bed plate 25 is provided which preferably is less indiameter than the base and has a central hub 26 in which is an aperture27 receiving the head 23 o-f the axle, the head preferably beingscrewed'securely into the aperture, so as to be firmly and accuratelyconnected to thev table. The table has a transverse guideway 28 thereinextending downward from the top portionof the table, and the top of thetable has parallel guides 29 and 30 secured thereto that extendpartially over the guideway 28. Two controlling heads or nuts 31 and 32are adj ustably guidedin the Vguideway and have vertical cylindricalposts 33 and 34 thereon, respectively. Each controlling head has ascrew-threaded bore 35 horizontally arranged therein, the screw threadin one being right hand and in the other left hand. The controllingheads are arranged equi-distant from the projection 24 on opposite sidesthereof, respectively. A controlling shaft 36 is arranged in theguideway 28 and extends through the controllingheads and it has acentrally arranged circumferential guide groove 37 receiving theprojection 24, and the shaft has oppositely pitched screw threads 38 and39 that engage the .corre sponding screw threads in the bores of thecontrolling heads 31 and 32 respectively. The ends of the shaft 36 haverecesses 40 and 41 and also sockets 42 and 43 therein respectively. Thecontrolling shaft preferably has a detachable device for operating it,so as to eliminate obstructions on the outside of the table. Therefore ashaft extension or key stem 44 is provided which is removably insertedinto either one of the sockets in the controlling shaft and has a crossbar 45 to be received into the adjacent recess to rotate the shaft. Thestem 44 has a screw driver portion 46 on its inner end and a head 47 onits outer end in which a cross bar lever 48 is secured and preferablyprovided with a crank arm 49. The screw driver portion is adapted tooperate different screws embodied in the structure of the engravingblock. The table 25 has a securing screw 50 vertically arranged thereina suitable -distance from the axle of the table, and it has a suitablecontact portion 51 projecting below the table and a head 52 arrangedabove the table. The contact portion may be forced against the top 5 ofthe base to ordinarily prevent rotation of the table, but if it isdesired to more firmly lock the table it may be turned until the contactportion 51 is brought to a socket 53 which is made in the top portion 5of the base to receive the contact portion of the se- Clllng SCIQW.

r1`he engraving block has two improved vise jaws 54 and 55 whichpreferably are shaped as segments of a cylinder, so as to have straightfaces 56 and 57 respectively.`

The jaws are composed of suitable material and preferably have yieldingface pieces 58' j'ect may be securely heldwithout permitting the lowerportions of the jaws to come together. VThe remaining side portions 64and 65 of the jaws respectively are curved cylindrically. and may bebrought into engagement withv an annular object to secure it while bein@engraved. The laws have flatV end portions 66 and 67 that are at rightangles to the straight sides 56 and 57 respectively, and sockets 68 and69 extend therefrom respectively to receive the posts lwhen the jaws areinverted. The sockets permit the jaws to be adjusted rotatively on theposts as the posts move the jaws each Vtoward or from the other as theyare supported upon the guides 29 and 30. The jaws arerprovided withsecuring screws 70 and 71 respec tively that are inserted in the curvedsides of the jawsto engage the posts 33 and 34 Vrespectively, whereby tosecure the jaws to the posts when desired.

. 1n the upper portion of the jaws, as shown in thedrawings, one jaw hasa suitable number of sockets 72 and 73 extending from the end 66, theopposite jaw having similar sockets 7 4 and 75 extending from the end67, the jaws being provided 4respectively with other similar sockets 76and 77, to receive universal clutch or grip devices of which two onlyare usually required for each jaw to be a'rrangedgas may be mostadvantageous inthe differentV sockets. The devices comprise cylindricalmain holders 78, 79, 80 and 81, all alike and interchangeable in thesockets, each suitably seatedso that the holders shall project a uniformdistance beyond the top ofthe jaws, the upper portion ofthe socketspreferably being counterbored to receive the holder rotatably. Eachholder has a flaringupper portion so as to have an annular bevel face 82presented downwardly toward the jaw whereby an object may be are engagedand held upon the jaw. rlhe side of each holder preferably has a recess83 there* in as clearance space to receive polrtions of cbjects workedupon. The top of each holder has a countersink 8e therein from whichextends a guide bore S5, the holder having a bottom 86 which isscrew-threaded in a suit able opening. The clutch or grip devicesinclude also a suitable number of studs 87, 88, 89, 90, all alike andcomprising each a. cylindrical main portion 91 that is rotatably guidedin the bore 85 and from which extends a screw-threaded shank 92 arrangedin the bottom 86 of the holder, so that the studs are adjustablevertically. The upper portion of each stud has aI circumferentiallyextending bevel portion 93 that faces downwardly toward the top of thejaw and may be received into the countersink 84: so that the stud neednot project obstructively when not required for use. The bevel portion93 is adapted to hold an article down to the top of the holder.

1n some cases the straight side of the jaw has a vertical groove 94arranged centrally to receive vertically arranged objects, and in somecases the straight side has also a shallow horizontal groove 95 and alsoa deeper groove 96 in which objects may be received and in some casesheld to be worked upon. Also in some cases the straight side portion ofeach aw has a concave portion 97 in which objects or portions thereofmay be received.

1n practical use the clutch or grip devices are suitably adjusted andplaced in the jaws, two in each jaw being usually required, so that anobject may be placed between the devices of the two jaws, and thecontrolling shaft is suitably turned so as to operate the jaws as may berequired to clamp the object in place to be worked upon. 1n some casesthe article is engaged by the bevel faces 82 of the holders; in othercases the object is placed upon the tops of the holders and engagedbythe faces 93 of the studs which may be raised or lowered as may benecessary, ac cording to the thickness of the article required to beclamped in place. In some cases an article may be held in the grooves 94while yin other cases an article may be held in the groove 95 or in thegroove 96; or in some cases an article mav be more conveniently held inthe concave recesses 97 of the ujaws. lVhen it is desired to reverse theaws to bring the curved sides thereof inward the jaws may be readilyturned on the posts. In some cases the aws are inverted and articles areclamped between the yielding pieces 58 and 59.

Having thus described the invention, what is claimed as new isl. Anengraving block including a table, two vise jaws removably mounted uponthe table and adjustable each toward the other and also rotatably on thetable, each vise jaw having a cylindrical socket in the top thereof thathas a cylindrical counterbore ofuni form diameter extending from the topof the jaw, a plurality of hollow cylindrical holdn ers removably androtatively seated on the bottom of the counterbore in the sockets rc,-spectively, each holder being laterally supported in the socketimmediately at the top of the jaw and having each an annular projectionat its top, the projection having a beveled edge facing toward the viseaw, and a plurality of studs adjustably supported vertically and rigidlysecured in the holders respectively.

2. An engraving block including a supported table, two controlled headsadjustably supported by the table and having each a vertical cylindricalpost, and two vise jaws having cylindrical sockets in their lowerportions Vremovably receiving the posts respectively and having alsosockets in their upper portions adapted to receive the posts when thejaws are inverted, the jaws being removably supported adjustably on thetable and adapted to be inverted thereon.

3. An engraving block including a base having a vertical central boretherein, a hollow bearing case secured in the central bore and having aball cup in the upper portion and an inverted ball cup in the lowerportion thereof, bearing ballsarrangcd in the upper one of the ballcups, an axle extending through the bearing case and having a conecollar arranged upon the bearing balls, the axle having a head extendingupward beyond the cone, a table secured to the head of the axle, a pairof vise jaws mounted on thc table, a cone collar adjustably connected tothe lower portion of the axle, and bea-ring balls arranged between theadjustable cone collar and the inverted ball cup.

4. An engraving block including a base having a vertical central boretherein, a hollow bearing'case secured in the central bore, an axlerotatably supported in the bearing case and extending above the topthereof, the top of the axle having a guide projection thereon, a tablesecured to the upper portion of the axle and having a guideway intowhich the guide projection extends, a screwthreaded operatingshaftirotatably arranged in the guideway and having a circumferentialgroove receiving the guide projection, the shaft having sockets in itsopposite ends to receive an operating extension shaft, controllablemovable heads in the guideway connected with the operating` shaft andhaving each a cylindrical vertical post, and two vise jaws supportedupon the table and having sockets therein receiving the postsrespectively.

5. In an engraving block, the combination with a base, a table, and apair of vise jaws mounted on the table, of a bearing case removablyinserted in the base, a seroo llO

curing screw inserted in the base and engaging said case, and an axlesecured to the table and rotatably supported by the bearing case.

`6. ln an engraving block, Vthe combination ot a base having a centralbearing and also a socket in thetop of the base at a distance from saidbearing, a table rotatably supported by the central bearing, a bindingscrew inserted in the table and projectible into said socket, and a pairof vise jaws mounted upon the table.

7. in an engraving block, the combination of a bottom member, a high andrelatively narrow circular wall supported on the bottom member, the wallbeing unyielding, a base with a spherically-curved bottom supportedslidingly on the inner edge or' the top of the wall, the base having avertical central bore therein, a hollow bearing case removably securedinV said central bore, an axle rotatably supported in the bearing caseand extending above the top thereof, a table having a hub secured to theupper portion of the axle, and vise jaws adjustably mounted upon thetable.

8. In an engraving block, the combination with a table, of two vise jawsadjustably mounted on the table and having each a cylindrical socket inthe top thereof, each socket having a counterbored upper portion, aplurality of hollow cylindrical holders supported rotatably in thecounterbored portion of the sockets respectively and having each anannular projection at its top, the projection having a beveled edgefacing toward Vthe vise jaw, the outer side of said holder having arecess below said lbeveled edge, and a plurality of studs adjustablysupported vertically and rotatively in the holders respectively andhaving each a projection extending about its top.

9. ln an'engraving block, the combination of a table, two controlledheads justably supported by the table and having each a verticalcylindricalpost, two vise jaws having cylindrical sockets in their lowerportions removably receiving the posts respectively and having alsosockets in their upperportions adapted to receive the posts when the awsare inverted, the jaws being removably supported on the table andadapted to be inverted thereon, each one of said jaws having acounteredbored socket in the upper portion thereern and having also astraight vertical face, the middle portion ot' the face being concave,said tace having a vertical groove and also horizontal grooves adjacentto the upper end thereof, a yielding stripvsecured in said face adjacentto the lower end thereof, a plurality of hollow cylindrical holderssupported in the counterbored portion of ,said sockets respectively, anda plurality of studs adjustably supported in the holders respectively.

l0. In an engraving block, the combination of a table, two controllableheads movably mounted in the table and having each a cylindricalvertical post thereon, two vise jaws supported on the table and havingsockets therein receiving the posts respectively, and a securing screwinserted iny one of the vise jaws and extending to the socket therein toengage the post'in the socket.

ll. in an engraving block, the combination of a base, a table rotatablymounted on the base and having a guideway in its upper portion, anoperating shaft guided in the guideway and having reversely pitchedscrew threads, two controllable heads movable in the guideway andconnected with the screw threads respectively, each controllable headhaving a cylindrical verticalV post thereon, and two vise jawssupportedV upon the table and having sockets therein that are inclinedto the side 'ace of the jaw to receive the posts respectively.

l2. In an engraving block, the combination of a table, two vise jawsadjustably mounted on the table and having each a pluralityofrcylindrical sockets in the top thereof, each socket having acounterbored upper portion, a plurality or hollow cylindrical holderssupported in the counterbored portion of the several socketsrespectively and having each an annular projecting beveled edge at itstop facing toward the vise jaw, the holder having a cylindrical guidebore therein and a countersunk portion at the top of the bore, and aplurality of studs adjustable in the guide bore ot the holdersrespectively and having each a projection extending about its top, theprojection being beveled to correspond to said countersunk portion, eachstud having va screw-threaded shank extending adjustably through thelower portion of the holder in engagement therewith.

ln testimony whereof, I aiiiX my signature in presence of .twowitnesses.V

' n HORACE PLUMMER.

TWitnesses E. T. SILvIUs, F. M. ROEDER.

